Women are most frequently affected, and may present with palpitations, chest discomfort, shortness of breath, weakness, exercise intolerance, lightheadedness, presyncope,
[ncbi.nlm.nih.gov]
[…] orthostatic intolerance —symptoms which develop in an upright position and are relieved by reclining. [7] These orthostatic symptoms include palpitations, light-headedness, chest
[en.wikipedia.org]
These symptoms include the following: Dyspnea Headache Disorientation Tremulousness Cold extremities Muscle weakness Visual disturbances Chest pain/discomfort Autonomic dysfunction
[disabled-world.com]